For years, Tyler Hildebrand’s wry, evocative work has been a refreshing addition to the Nashville art scene. Though cartoonish and often lurid, his bold, graphic work tells compelling, semi-autobiographical tales of distorted souls rapt in violence, vice or some absurd, very-American fate. In his latest solo show, “The Retirement Party,” the artist says sayonara to the art world with over 60 signature mixed media pieces replete with fast food and sports imagery as well as cameos from Tim Allen, Oprah, David Letterman and. of course, Snoopy,